Handlebar js对象迭代

Question

在我的gulpfile中，我定义了一个要传递给模板的memberInfo对象数组：

var gulp = require('gulp');
var handlebars = require('gulp-compile-handlebars');
var rename = require('gulp-rename');
var handlebars_helpers = require('handlebars-helpers')(); 
//http://assemble.io/helpers/helpers-html.html
var _ = require('underscore');

gulp.task('default', function () {
    var templateData = {
        memberInfo: [
            {"member_email": "amy@email.com", "list_id": "2", "name": "obsession cologne 3 oz", "brand": "", "price": "55.99"},
            {"member_email": "amy@email.com", "list_id": "1",  "name": "red plaid skirt", "brand": "versace", "price": "55.99"},
            {"member_email": "amy@email.com", "list_id": "1", "name": "black ruffle shirt", "brand": "versace", "price": "47.99"},
        ]
    }

    options = {
        helpers: _.extend(handlebars_helpers) 
    }

    return gulp.src('template/email.handlebars')
        .pipe(handlebars(templateData, options))
        .pipe(rename('email.html'))
        .pipe(gulp.dest('output'));
}

我想在我的模板上做的是“对于memberInfo中的每个对象，如果list_id等于1，则显示这些字段”

{{name}}
{{brand}}
{{price}}

这样做的正确方法是什么？我是一个全新的酒杯和把手，我找到的解释在这种情况下似乎没有任何意义。Handlebar-helpers有一个很好的比较操作符{{#is }}，所以我写了这段代码，但它显然没有正确设置：

<ul>
  {{#each memberInfo}}
    {{#each this}}
        <li>Key: {{@key}} Value = {{this}}</li>
        {{#is @key 'list_id'  }} 
            {{#is this 1 }}
               {{name}}
               {{brand}}
               {{price}}
               //Nothing is accessible here except this, as far as i can tell, so none of these values render

            {{/is}}
        {{/is}}

    {{/each}}
  {{/each}}
</ul>

Answer 1

我为这个半途而废的评论道歉，但我现在没有时间完整地回答它。我有类似的情况，但我希望获得匹配和渲染的项数。这是handlebars helper，我希望这个想法能有所帮助。如果没有，请让我知道，我可以很快添加更多的上下文。

exports.filterLength = function (object, property, value, options) {
  var ret = 0;

  for (var i = 0, j = object.length; i < j; i++) {
    if (object[i][property] === value) {
      ret = ret + 1;
    }
  }
  return ret;    
};